.signup-container {
  max-width: 500px;
  margin: 0 auto;
}

.error-box {
  background: #ffecec;
  color: #d00;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 15px;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  font-weight: bold;
  display: block;
  margin-bottom: 5px;
}

.terms-box {
  margin: 20px 0;
}

.terms-label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.submit-btn {
  width: 100%;
  padding: 12px;
  background: #333;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

.submit-btn:disabled {
  background: #aaa;
  cursor: not-allowed;
}


/* 利用規約に同意する */
.terms-box {
  margin: 20px 0;
}

.terms-label {
  display: flex;
  align-items: center;  /* ←縦中央揃え（重要） */
  gap: 8px;
  cursor: pointer;
}

.terms-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;           /* ←ズレ防止 */
}

.terms-text {
  font-size: 14px;
}

.terms-text a {
  color: #007bff;
  text-decoration: underline;
}

/* =========================
   ERROR UI
========================= */

.field-error {
    position: relative;

    margin-bottom: 10px;
    padding: 12px 14px;

    border-radius: 14px;

    background:
        linear-gradient(
            135deg,
            rgba(255,77,109,0.14),
            rgba(255,77,109,0.08)
        );

    border:
        1px solid rgba(255,77,109,0.28);

    color: #ff6b81;

    font-size: 13px;
    font-weight: 600;
    line-height: 1.7;

    letter-spacing: 0.2px;

    backdrop-filter: blur(10px);

    box-shadow:
        0 4px 18px rgba(255,77,109,0.08),
        inset 0 1px 0 rgba(255,255,255,0.04);

    animation: errorFade 0.25s ease;
}

/* ul消し */
.field-error ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.field-error li {
    margin: 0;
}

/* 左アクセント */
.field-error::before {
    content: "";

    position: absolute;

    top: 10px;
    left: 0;

    width: 4px;
    height: calc(100% - 20px);

    border-radius: 999px;

    background: #ff4d6d;
}

/* 軽い表示アニメ */
@keyframes errorFade {

    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* エラー入力欄 */
.has-error input,
.has-error select,
.has-error textarea {
    border: 1px solid rgba(255,77,109,0.5) !important;

    box-shadow:
        0 0 0 4px rgba(255,77,109,0.08);

    background: rgba(255,77,109,0.03);
}

.field-help {
    margin: 6px 0 0;
    font-size: 12px;
    color: #78909c;
}

.field-warning {
    display: none;
    margin-top: 6px;
    padding: 8px 10px;
    border-radius: 6px;
    background: #fff3f3;
    color: #d32f2f;
    font-size: 13px;
}

.field-warning.show {
    display: block;
}